Relay Wire Harness Manufacturer – Custom Relay Harness Assemblies
Linkwings is a reliable relay wire harness manufacturer offering custom-built solutions for automotive, industrial, and power control applications. ISO & RoHS compliant, fast lead times.
Custom Relay Harness Manufacturer and Supplier in China —— Linkiwngs
Linkwings is a professional relay harness manufacturer and design supplier dedicated to providing global customers with highly reliable, customizable electrical connection solutions.
With years of harness manufacturing experience and a comprehensive production system, we not only offer standard relay harnesses but also customize composite harnesses with various structures such as sockets, fuses, and waterproof connectors based on customer drawings or application requirements. Our services span multiple application scenarios, including automotive electronics, industrial control, battery management, energy storage systems, and smart devices.
In the field of relay harnesses, Linkwings’ core value is reflected in the following aspects:
- Professional customization support: From BOM drawings to actual harness structures, we provide full-process engineering assistance;
- Strong process capabilities: We have mature processes such as automatic wire stripping and crimping, heat shrink packaging, and terminal marking;
- Rapid and stable delivery: Standard products are delivered within 7–10 days, with samples available as quickly as 3 days;
- Quality assurance system: All harnesses undergo 100% factory electrical testing and support UL, RoHS, and ISO-certified materials;
- Global service experience: We have served numerous clients from North America, Southeast Asia, and Europe, with expertise in export procedures and multilingual collaboration.
We believe that a well-designed, reliable relay harness not only enhances product system performance but also brings stability and efficiency to the entire manufacturing process. Contact us today to get your customized relay harness solution!
Relay Wire Harness Collection
Linkwings offers a wide range of relay harnesses for use in automotive electronics, industrial control, power systems, energy storage equipment, and other applications. Our products support multiple interface standards, structural combinations, and electrical performance requirements, and can be customized according to customer drawings, samples, or electrical system requirements.
Standard Relay Harness
- Compatible with commonly used 4-pin/5-pin relays (such as Bosch type, ISO mini type);
- Provides relay socket + wiring tail wire, supports with/without fuse structure;
- Suitable for use in general vehicles, mechanical equipment, lighting control systems, etc.
Commonly used for: horn control, headlight switching, fan relay, air compressor control, etc.
Automotive Relay Harness
- Specifically designed for automotive wiring harness systems, compatible with automotive-grade connectors (such as TE, APTIV, etc.);
- Can be integrated with fuse boxes, waterproof plugs, wire number labels, and other accessories;
- Supports special requirements such as high temperature resistance, vibration resistance, dustproof, and waterproof (IP67 level).
Commonly used in: electric vehicle main power distribution systems, lighting modules, cooling systems, electric tailgates, etc.
Relay + Fuse Integrated Harness
- Integrate relay sockets and blade fuse modules into a single wiring harness;
- Reduce wiring complexity, improve space utilization and maintainability;
- Suitable for power management modules or centralized wiring scenarios in central control boxes.
Commonly used in: small distribution boxes, device main control boards, energy storage system power input controls
Industrial Relay Harness
- Relay interface wiring for PLC control cabinets and industrial automation equipment;
- Supports plug-in ports for DIN rail mounting modules (such as European terminals and terminal blocks);
- Can be equipped with terminal crimp heads, wire number identification, and fireproof insulated sleeves.
Commonly used for: solenoid valve drive, pump control, fan start/stop, and PLC control module connection.
Multi-channel Relay Harness
- Supports multiple relay parallel control line outputs, suitable for multi-point load systems;
- Structurally designed with multiple branches/parallel outputs, with numbering and unified connectors;
- Provides color-coded control and power lines and complete wiring diagrams.
Commonly used in: battery pack multi-channel protection modules, communication cabinets, smart control panels, etc.
Custom Relay wire Harness Service
- Customized development based on customer-specific requirements (current, voltage, wire length, connector brand);
- Optional features: waterproof heat shrink, laser marking, cable bundling, copper terminal crimping, etc.;
- Supports a complete delivery model from sample prototyping, small-batch pilot production to large-scale production delivery.
Suitable for all OEM customers, system integrators, and R&D testing projects.
Application Scenarios of relay wire harness
Linkwings’ relay harness products are widely used in multiple industries and systems, covering automotive electronics, energy storage systems, industrial control, power management equipment, smart equipment, and other fields. We not only provide standardized products, but also offer in-depth customization services to meet customers’ diverse connection needs in actual scenarios.
Automotive Electrical Systems
- Used to control high-current components such as horns, headlights, cooling fans, electric seats, and electric tailgates;
- Meets automotive-grade wiring harness requirements for heat resistance, waterproofing, and vibration resistance;
- Can be integrated with fuse modules and sockets, with integrated wiring for easy installation by OEMs or aftermarket manufacturers.
Application Examples: Main power harness for new energy vehicles, lighting control harness, 12V power relay system.
Energy Storage & BMS Systems
- Used for logic control in battery management systems, including high-voltage power cut-off control, charge/discharge switching, and backup power switching;
- Supports interlocking with DC contactors, low-voltage signal output modules, and overcurrent protection systems;
- Can be designed with multi-relay control integrated wiring harnesses to reduce the complexity of internal cabinet wiring.
Application examples: Energy storage inverter control circuits, residential energy storage relay input/output connection cables.
Industrial Automation & PLC Wiring
- Interface connection between relay modules and actuators in automated equipment;
- Supports terminal adaptation for DIN rail-mounted modules (European plugs, spring terminals, etc.);
- Used in conjunction with PLC output modules to achieve rapid wiring and port identification.
Application examples: solenoid valve drive, pump start/stop control, industrial machinery control system wiring harness.
Control Panels & Distribution Boxes
- Integrate relays, fuses, terminal blocks, and other components into small and medium-sized control boxes;
- We provide integrated assembly harnesses to improve space utilization and assembly efficiency;
- Each wire is numbered and labeled with a wire number for quick wiring and easy maintenance.
Application examples: smart building control boxes, automatic door control systems, power distribution boards
Special Vehicles & Equipment
- For use in construction machinery, forklifts, aerial work platforms, agricultural machinery, yachts, and other equipment;
- Provides relay harness solutions for use in environments with UV exposure, high temperatures, and oil contamination;
- Custom-developed durable harnesses designed to withstand high vibration and dusty environments.
Application examples: off-road vehicle lighting control systems, heavy-duty electric equipment power failure protection harnesses.
Power Switching Systems
- Applicable to relay control applications such as dual power supply input, load isolation, and battery pack switching;
- Supports composite functional structures such as relay + fuse + diode parallel connection;
- Can be connected to smart devices such as power management ICs and MOS control modules.
Application examples: UPS uninterruptible power supply relay switching, off-grid system power selection control
FAQs about Relay Wire Harnesses
1. Can you customize relay harnesses based on drawings or samples?
Yes. Linkwings supports customers in providing drawings (2D, 3D), samples, or connection relationship descriptions for customized development. The engineering team can assist in optimizing wire length, branch structure, connector selection, etc., to achieve rapid prototyping and small-batch verification.
2. Can relay sockets and wire harnesses be delivered as an integrated unit?
Yes. We offer integrated services for relay sockets, wires, fuse boxes, and waterproof plugs. This helps customers reduce assembly costs and installation time while ensuring the reliability and consistency of wire harness structures.
3. What certifications do your relay harnesses support?
The cables and connectors we use can provide UL, RoHS, REACH, ISO 9001, and other certification materials. We can also provide material certificates, batch traceability records, and third-party test reports according to project requirements.
4. Do you support automotive-grade waterproof connectors? What is the highest protection rating?
Yes, we support automotive-grade waterproof connectors. We offer connectors from well-known brands such as TE, APTIV, and KET, with the highest protection rating reaching IP67/IP68. These connectors are suitable for harsh environments such as vehicle chassis and high-humidity, high-temperature conditions.